About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 135. Chapters: Gunpowder, Rocket, Crossbow, Compass, Kite, Flamethrower, Naval mine, Gnomon, Red envelope, Armillary sphere, Dragon boat, South Pointing Chariot, Seal, Chopsticks, Paper, Seismometer, Chinese swords, Dzi bead, Horse collar, Trip hammer, Lacquer, Wheelbarrow, Dao, Suanpan, Jian, Joss paper, Fire Arrow, Bamboo-copter, Chain pump, Nine Tripod Cauldrons, Kang bed-stove, Rice paper, Chinese yo-yo, Hook sword, Inkstick, Luopan, Chinese Inkstone, Jade burial suit, Hell bank note, Imperial Seal of China, Bi, He zun, Baoding balls, Chinese scholar's rocks, Butterfly sword, Spirit tablet, Zhanmadao, Chopstick rest, Three ancestral treasures, Dadao, Bamboo and wooden slips, Changdao, Chinese candy box, Cong, Chinese boxes, A Fu. Excerpt: A rocket or rocket vehicle is a missile, spacecraft, aircraft or other vehicle which obtains thrust from a rocket engine. In all rockets, the exhaust is formed entirely from propellants carried within the rocket before use. Rocket engines work by action and reaction. Rocket engines push rockets forwards simply by throwing their exhaust backwards extremely fast. Rockets for military and recreational uses date back to at least 13th century China. Significant scientific, interplanetary and industrial use did not occur until the 20th century, when rocketry was the enabling technology of the Space Age, including setting foot on the moon. Rockets are used for fireworks, weaponry, ejection seats, launch vehicles for artificial satellites, human spaceflight and space exploration. While comparatively inefficient for low speed use, they are very lightweight and powerful, capable of generating large accelerations and of attaining extremely high speeds with reasonable efficiency. Chemical rockets are the most common type of rocket and they typically create their exhaust by the combustion of rocket prope...
